ok, I suspect the same configuration might not work on your new server due to usb bus differences
we need to execute the command "dahdi_registration" to verify
but with the xorcom connected
this should be the output in the new server too:
http://pastebin.com/PMUFyZwb
spans 1 to 4 are XBUS-00
spans 5 yo 8 are XBUS-01
if it's inverted, then that's the problem